Allegro Microsystems A8590

Description

Designed to provide the power supply requirements of nextgeneration car audio and infotainment systems, the A8590provides all the control and protection circuitry to produce ahigh current regulator with ±1.0% output voltage accuracy.The A8590 employs pulse frequency modulation (PFM) todraw less than 50 μA from 12 VIN while supplying 3.3 V/40μA. After startup, the A8590 operates down to at least 3.6 VIN(VIN falling).Features of the A8590 include a PWM/PFM mode control inputto enable PWM (logic high) or PFM (logic low). If the PWM/PFM input is driven by an external clock signal higher than thebase frequency (fOSC) the PWM frequency synchronizes to theincoming clock frequency. The SLEEP input pin commandsan ultra-low current shutdown mode requiring less than 5 μAfor internal circuitry and 10 μA (max) for MOSFET leakageat 16 VIN , 85ºC. The A8590 has external compensationto accommodate a wide range of frequencies and externalcomponents, and provides a power-on reset (NPOR) signalvalidated by the output voltage

Features

Automotive AEC-Q100 qualified

• Withstands surge voltages up to 40 V
• Operates as low as 3.4 VIN (typ) with VIN decreasing
• Utilizes pulse frequency modulation (PFM) to draw onlytens of microamperes from VIN while maintaining keepaliveVOUT
• PWM/PFM mode control input pin
• Delivers up to 3.0 A of output current with integrated 110mΩ high voltage MOSFET
• SLEEP input pin commands ultra-low current shutdownmode
• Adjustable output voltage with ±1.0% accuracy from0°Cto 85°C, ±1.5% from –40°C to 150°C
• Programmable switching frequency: 250 kHz to 2.4 MHz
• Synchronization capability: applying a clock inputto thePWM/PFM input pin will increase the PWMfrequency

Typical applications

• Audio Systems,Navigation• Home audio
• □□Instrument Clusters,HVAC

More information

• Datasheet
• IC product information